Dredger-bucket.



y paesana sucrg.- r

`Application pr. 1.0, 1399. Ranewocf Apn, 1900.)

(No Model.)

' l @I V A. a?

No. 652,738. Patented my 3, ma. w. H. ARNOLD.

'nnEnGEn Buma-:1.

(Application filed Apr. 10,11899. Renewed Apr. 24, 1900.)

(no Mom.) s sheets-snaai s.

' Homey l h tends below the shells and .isY tcrminated'by a blade 16 or other suitablyfformed device scribed, andrsetjorthinthe claims.Y

WILLIAM H. ARNOLD,

'senses or New Youn, N. Y.

suben SPEQCATION forming' part of Letters Patent No. 652,738, dated July 3, 1960` l Application lad April l0, 1899. Renewed April 24, 1900i Serin-l No. 14,189. (No model-l Y T0 I cell wha/nit '-z may con/cern:

Be it known that I, WILLIAM-IH. ARNOLD, a citizen of the United States, and a resident of New York,(Brooklyiu) .in .the county of Kings and State of New York, have invented certain new and useful Improvements in' Dredgerjuckets, of which the following is a specification. I Y

This invention relates to buckets for dredgers, and particularly to clam-shell buckets., The main object of the invention is to cbxstruct a bucket for dredgers which will read-f. ily dig hard material, which will maintainvr its position while filling, and which may be opened and closed by fluid-pressure;

With this object in view the invention conisists in the construction, combination, and arrangement of parts'hereinafter fully de- In the acconipanyingdVF awiugs, which form/ a part of this specification, Figure l repre-f sents the improved bucket open andl in side elevation. Fig. 2 represents it closed and in front elevation. 'Fig.'3 is a side elevationof the frame. Fig. 4 is a vertical medial section of the frame, taken on line l 4, Eig. 3. Fig. 5 representsthe closed bucket in a partial plan view, the framezloeing sectionedon the line 5 5 of Fig. 2. Figs. Gand 7 repre'- sent, respectively, a vertical and lioriionta'lt section ofthe fluid-pressure cylinder. Fig. 8 represents the compensating device for the huid-pressure tubes. Y.'

The bucket has a frame 10, in the'upper end of which is a slot'. In this slot is pivoted an equalizin gr bar 1l, to the ends of which are attached the chains or cables by which the bucket is suspended. The sides of the slotl protect the bar throughout its extent and also the connections thereto of the suspension chains or cables( By means ofthis equalizing-bar the vertical descent of the bucketcis- 'insuredv 1 To the frame lOare hinged the shells of the bucket or the scoops 12 and 18. These are shown as hinged on separate pintles 14 15 and are preferably so hinged since either shell may then be removed Without aiectiug the other. They may, however, obviously be hinged both on one pintle. The'frame l0 exwhich will serve as a means for anchoring the bucket or for holding it while filling in aiixed position in the material to be removed. The blade 15 is preferably'made of steel and riveted to the frame, so that it may be replaced bya new one when worn out or broken. The scoops or shells close against the frame' or the sides of said blade.

shells is fixed in the frame l0 and preferably vice consists of a cylinder, as l'Z, and its pis'- /Lt'gon 18, the cylinder being provided' with flanges by which it is riveted or bolted to inderV His-shown as located between the shells, and its lower end is protected by the of the anchoring-blade 16. 'lhrough-the middle of the frame suitable Ways or guides are formed, upon which a cross-head'2l may reciprocate. This cross-head is attached to the upper end of the piston 18. .To the crossn and-close the bucket.' To brace the rims of bucket. If desired, sockets, as 25 and 26, may be provided at the edges of the frame for the usual guide-poles. The upper ones obviously be cast thereon or omitted.

'ing the piston 1S, air being preferable.` tube, as 27, conducts the air to the'l'owe'rl end of the cylinder for raising the piston and ducts the air to the upper end of the `cylinder for depressing the piston and closing the bucket.

well down therein, so as to limit the length,- of the bucket as much as possible. Said deilanges 19, formed upon the frame. The cylv i:ininic aLenlargensent 2 0. .formedv inthe middle.

theshells during the manipulation thereof, i suitable links, as 23, are pivoted to bosses on The opening the bucketfand a tube, as 28, con- The Huid-pressure device for operating the head and to the upper rim of the shells 12 and 13 are hinged the A-shaped links or arms 22 for raising and lowering the shells to open the shell and to increase the capacity of the 2 5 are shown riveted to the frame, but may Any suitable fluid may be used for operat- The air for operating the bucket, as described, ispreferably controlled from 1 the deck of the dredger, as by means o iany suitable cock bywhich pressure may be ap- 5 bucl-zetdescends.

plied first through one tube and then through the other, :is occasion requires. The exhaust muy take pince et the cock or at the cylinder i7, as desired, but preferably at the cock. A con trolling`cock for the purpose slated is indicated nt- 29.

Suitable means must be provided for taking cere of the :tintubes when the bucket is drawn up and lor paying them out when the One wey by which this may be :Accomplished is represented in Fig. l, wherein 30 indicates the boom from which the bucket is suspended. To the boom is fixed n shcfrvo, ss 3l, and below this sheeve is' locn-tcd another one, as 32, to cooperate therewith. 'ihe latter onefis mounted in an y suitable manner upon aslide, so ns to freely move to find from the pulley 3l. The tubes nre posed around' the associated pulleys or shenves several times and then secured in any suitable way to the-boom-ns, for instance, to nipples,y es 33, which are liked to the boom und from the opposite ends of which the tubesi :ir-c continued to the controlling-cock 29. The sheaves 'just described serve as a com pensating device. As the bucket descends the tui-ves run oft sheav'c 3l, thereby drawing up the l buclreblced from the bottom.

shenve 32, ond as the bucket is hoisted the shenve descends along' its breek and draws in the tubes overshenvc 3l.. The longer sheeve ,1 may be weighted sufficiently to make it respond promptly tothe notion of the bucket. To take the strain oli the tubes, a rope or cable, :is indicated at 34, may be secured to the bucket und to the nipple-plate on the boom Eind follow the tubes about the sheaves. This will prevent the tubes -troni being unduly;T strnincd or flattened on the sheaves.

in operating the bucket the shells are thrown open, as seen in Fig. l., thus causing the binde or anchor 1G to project well below them. As the bucket descends this blade is buried in the bottom-the material to be remored-and lmnchors the bucket. Then the oir is turned onto the top of the piston and. the shells forced into the bottom until they meet on the blade. The cutting of the shells toward the cut already mede in the betteln by the blade causes a. readierclcnvege of the Then, too, the binde helps with the weight of the bucket to mld it down while the shellsv are forcing their any through the motorini to be raised. ln n bucket operated thus by lluidpressnre the disturbing effects duc to the lifting action of the bucket-closing ch. fot the ordinary bucket are avoided und the complete filling of the bucketinsurcri. xhen the filled bucket hss been litted onli swicng over the receiving-soon', it is quiclrlgv lumped by reversing the cock As the piston nscends in opening the bucket it may be prevented from striking the heful or the cylinder by intorpcsiug between the piston-rod and freine n bn er, es indicated nt 35.

L 'lill be noted by reference to Fig. l that l. owner surface o @zich c. thoseoops is concentric with the axis of its hinge. This provides for the scoops entering the material to be removed without imparting to the bucket 7o e lifting tendency. It will also be noted that While the outer surfaces of the scoops are concentric withv the axes of the hinges the inner surfaces are eccentric thereto. This increases the thickness and therefore the strength of 75 the scoops at their rim, where power is applied, nnd also renders the scoops capable of digging more deeply into the bottom.

Many changes in the shape and construction of the bucket and in the combination of 8o parts and in the operating and controlling mechanism may be made aside from those herein shown and described Without departing from the spirit of the invention.

The invention claimed is 85 l. Thecombinntion withcdredging-bncket enf the suspension chains or cables, of an equalizing-har by which snidchcins or cnbles are connected to the bucket, and projec- :tions for the frame ofthe bucket for prolect- 9o ing seid bar and the chain connections there-y with.

2. A dredging-bucket having a frame provided with means projecting therefrom into the materiel to be removed for holding the 95 bucket in a fixed position in said material while filling, and shells or scoops each hinged to said frame and means for moving them towurdjend from erich other.

3. A dredging-bucket having n' frame to loo which the shells or scoops are hinged z md against wbivch they close.

,4. A dredging-bucket having a frame to which the shells or scoops are hinged and which terminates in a, blade or anchor.

5. The combination with n dredging-bucket, having a. central frame provided with an anchoring-blade, of fluid-pressure mechalnism for closing the bucket.

6. lhecombination withadredgingbuckct 11o provided. with means for anchoring it while filling, of o. fluid-pressure cylinder and piston located within the bucket and connected los to the outer edges of the shells for closing nod opening them.

7. ln-o dredging-bucket, the combination with o. central frame, of the shells or scoops hinged by their inner corners to the frame, and :i fluid-pressure mechanism mounted on the treme and connected to thc outer edges rzc of "the shells for operating; them. I' l 8. The combination with the frame, of the shells or scoops hinged thereto by their inner corners, a fluidi-presen re cylinder nrlnnted in the frame, cross-hond connected to tho pis- 125 ton in said cylinder and gnidedinsnid frame, and arms connecting the` cross-heed to the outer edges of the shells or scoops.

9. The combination with the frame and shells hinged thereto, of nrms connected tothe Igc shells for operating them, and links hinged toA the frame and to th'c rims of the shells for bracing them duringr operation.

l0. The combination with the frame :in'd

the @heus mtntsiritegn, of the steei mede or anchor extending across the lower end 4of the frame, end rcmovablysecnred thereto that it may be replaced when worn ont or 5 broken.

. 11. The 'combination with the frame and the duid-pressure cylinder mounted therein, 0f n bindeA cr anchor extending across the providedftvith a ,oshieid for said cylinder. I

` .12.- lheconlbinaition wit-hadredgingbncket :z5 with a frame and anchoring-blade, snbstantiaily as described, of the shells or/scoops bucket isA suspended,

hinged tothe'fmmeuand having their unter surface concentric with theaxis 'of thehinge whereby any tendency on their part to lift the bucket. dering the scooping action is yer" come. A. Y

15. In a. 'dredging-bucket, the combination with e freinennd anchoring-blade, substantiallytas described, of l'tiiesheils or scoops hinged to the'ffram'c {nit-having their outer surface, concentric .with thenxis of be scooped up. 1 16, The combination with the ,frame and the uidfpreisssnre cylinder of a shieldforthe cylinder located beneath it, and means for anchoring the bucket securedto the lower-"end of the frame.

Signed at New York, in the county of New York and State ofNe'w York, this 5th deyof A pril, A. D. 1899.`

AWitn esses: y

WM. H. CAPEL, C. L. Entel-fum.'l

ihehing'e and 'Y their innerzsurgces eccentric thereto mounted therein,

WILLIAM n ARNOLD. 

